THERE’S A REASON everyone hates printers. They break, jam, and always run out of cyan ink—which, inexplicably, also breaks them. Even when they work, toner costs so much you have to give up avocado toast for a month to buy more. As Matthew Inman, one of the great poets of his time, famously said: “Either printer ink is made from unicorn blood or we’re all getting screwed.”

Impression Products wanted to make toner a bit cheaper by refilling Lexmark printer cartridges. Lexmark of course hated that and sued. The fight dragged on for years, and made it all the way to the US Supreme Court. This week, the highest court in the land ruled against Lexmark. You may consider this an insignificant tussle over printer toner, but this important ruling clears the way for small businesses to fix your stuff—even without the manufacturer’s permission.